Piston ring



C. W. CLARK PISTON RING April 18, 1933.

("m6 Mi /601% Filed Nov. 11, 1932 Sum/m4 Patented Apr. 18, 1933 UNITED STATES PATENT OFFICE CARL w. CLARK, or BETHESDA, OHIO, AssIc-won'o'r ONE-FOURTH To CECIL L, AYERS, or s1. GLAIRSVILLE. OHIO, AND ONE-FOURTH 'ro s.- '1. VAUGHN, or BETHESDA,

PISTON RING- Application filed. November 11, 1932. Serial No. 642,293.

The invention has relation to piston rings, and particularly to piston rings operating on the exhaust stroke of the piston to remove excess oil from the cylinder wall; an object of the invention being to providean improved ring of this description of simple nature, capable of economical manufacture, and adapted to prevent the oil accumulated by the scraping edge of the ring from working back of the ring whereit tends to became carbonized and interfere with the proper working of the ring.

The invention consists in the novel construction and combination of parts as set forth in the appended claims.

' In the accompanying drawing illustrating the invention:

Figure l is a central longitudinal section of the ring, as applied, on an enlarged scale.

Figure 2 is a perspective view of the ring,

partly broken away.

In the drawing, the numeral 1 designates a piston having the usual groove 2 for the ring, which ring in the present case comprises a hollow cylindrical body 3 of rectangular form in cross section, having an annular right angle oil scraping edge 4;, and a thinho-llow cylindrical axially extending flange 5, also of rectangular form in cross section, of equal 0 thickness throughout, and located intermediately of the inner and outer cylindrical surfaces of said body and adjacent the outer cylindrical surface thereof, the inner and outer cylindrical walls 6 and 7 of said flange cylindrical walls of said body, and transversely spaced from the latter walls.

The piston is slightly reduced'in diameter diately of the piston groove 2 and an oil drain slot 10 of the piston.

The oil accumulated by the scraping edge 10 of the piston.

diately of said groove and said slot, of a pisbeing located in cylindricalplanes parallel with each other and with the inner and outer to provide a ring land 8,v located interme-' come marred or broken or tocut the hands in installation or removal of the ring. The squared lower edge 9 of the flange extension is shown as overlying the oil release groove I claim: p 1. The combination with a piston having a ring groove and an oil drain slot and a ring land of reduced diameter located intermeton ringlocated in said groove and'having an axially extending flange located intermediately of the inner and outer faces of said ring and extending downwardly over said ring land to said oil drain slot, whereby oil is prevented from passing behind said ring. 2. The combination with a piston having a ring groove and an oil drain slot and a ring land of reduced diameter located intermediately of said groove and said slot, of a piston ring located in said groove and having an axially extending flange. located intermediately of the inner and outer faces of and adjacent the outer face of said ring and extending downwardly over said ring land to said oil drain slot, whereby oil is prevented from passingbehind the'ring, said ring being transversely split, of rectangular form in cross section and having a right angle oil scraping edge, and said flange being also of rectangular form in cross section.

In testimony whereof I aflix my-signature;

' CARL W. CLARK. I 

